var youKu = document.getElementById("youku")
		var bodyscoll = document.getElementById("bodyscroll")
		var btnHead = document.getElementById("headerbtnn");
		var HideVideo = document.getElementById("video");
		var VideoWrap = document.getElementById("videowrap");
		var VideoClose = document.getElementById("VideoClose");
		btnHead.onclick = function() {
			HideVideo.style.display = "block";
			VideoWrap.style.height = "531px";
			VideoWrap.style.width = "944px";
			bodyscoll.style.position = "fixed";
			setInterval(function() {
				youKu.style.display = 'block';
			}, 2000)
			setInterval(function() {
				VideoClose.style.display = 'block';
			}, 1000)

		}
		VideoClose.onclick = function() {
			HideVideo.style.display = "none";
			bodyscoll.style.position = "inherit";
		}